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A charge of +111 C is fixed at the center of a square that is 0.80 m on a side. How much work is done by the electric force as a charge of +8.1 C is moved from one corner of the square to any other empty corner?
Ultraviolet light is incident normally on the surface of a certain substance. The binding energy of the electrons in this substance is 3.44 eV. The incident light has an intensity of 0.063 W/m2
The sound a string guitar can be varied by changing the tension in each string. what are the wave's natural frequencies
How much time takes to release net radiant energy from body
A student drops a lit firecracker off the roof of abuilding with an initial velocity vo=0. She hearsit explode 10s later. The speed of sound is 330. What is its speed when it exploded
two newly discovered planets follow circular orbits around a star in a distant part of the galaxy. the orbital speeds
A rock is dropped from a high tower and falls freely under the influence of gravity. Which one of the following statements concerning the rock as it falls is true? Neglect the effects of air resistance.
Over a time interval of 1.92 years, the velocity of a planet orbiting a distant star reverses direction, changing from +19.7 km/s to -19.1 km/s. determine the total change in the planet's velocity
An isolated container holding 30 g of hydrogen gas is at 25degrees C. If 1,000 calories were transferred to the gas, what would be the new temperature of the gas
A U-shaped tube open to the air at both ends contains some mercury. Calculate the vertical distance h from the top of the mercury in the right-hand arm of the tube to the top of the water in the left-hand arm
what will be the induced emf magnitude in the short coil. A 77.9 kg fireman slides down a 4.13 m pole by applying a frictional force of 343 N against the pole with his hands. If he slides from rest, how fast is he moving once he reaches the ground.
A spaceship ferrying workers to Moon Base I takes a straight-linepath from the earth to the moon, a distance of about 384,000 km. What is the maximum speed attained
a golf ball is struck with a five iron on level ground. it lands 91.8 m away 4.20 s later. what was a the direction and
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